Finding the Fourth Proportional to 10,154.72, 14,013.59 and 5,678.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,154.72 : 14,013.59 = 5,678.89 : x
2. Step 2: Convert to fraction form
   10,154.72/14,013.59 = 5,678.89/x
3. Step 3: Cross multiply
   10,154.72x = 14,013.59 × 5,678.89
4. Step 4: Simplify right side
   10,154.72x = 79,581,572.69
5. Step 5: Solve for x
   x = 79,581,572.69/10,154.72
6. Step 6: Final answer
   x = 7,836.90